1
GATE EE 1995
MCQ (Single Correct Answer)
+1
-0.3
A synchronous motor on load draws a current at a leading power factor angle $$\phi$$. If the internal power factor angle – which is the phase angle between the excitation e.m.f. and the current in the time phasor diagram is $$\psi$$, then the air gap excitation m.m.f lags the armature m.m.f by
A
$$\psi$$
B
$$\frac{\mathrm\pi}2+\psi$$
C
$$\frac{\mathrm\pi}2-\psi$$
D
$$\psi+\phi$$
2
GATE EE 1992
MCQ (Single Correct Answer)
+1
-0.3
The torque angle of a synchronous machine operating from a constant voltage bus, is usually defined as the space angle between
A
Rotor $$mmf$$ wave and stator $$mmf$$ wave
B
Rotor $$mmf$$ wave and resultant flux density wave
C
Stator $$mmf$$ wave and resultant flux density wave
D
Stator $$mmf$$ wave and resultant $$mmf$$ wave
3
GATE EE 1992
MCQ (Single Correct Answer)
+1
-0.3
The developed electromagnetic force and or torque in electro $$-$mechanical energy conversion systems act in a direction that tends
A
to increase the stored energy at constant $$mmf$$
B
to decrease the stored energy at constant flux
C
to decrease the co-energy at constant $$mmf$$
D
to decrease the stored energy at constant $$mmf$$
GATE EE Subjects
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Medical
NEET
Graduate Aptitude Test in Engineering
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CBSE
Class 12